Issue Outgoing emails get rejected - User not allowed to send Emails

[Stephan.FediCom]

Server operating system version

Ubuntu 22.04

Plesk version and microupdate number

18.0.62 #2

Hey Guys,
first of all, I read really a lot of forum threads and I did not find anything that really relates exactly to my problem.
I get the following Error Message in my Email Log Browser:

2024-08-13 10:50:47	info	plesk-sendmail [4189]	S4188: py-limit-out: stderr: REJECT
2024-08-13 10:50:47	info	plesk-sendmail [4189]	S4188: py-limit-out: stderr: DATA REPLY:554:5.7.0 Your message could not be sent. The user [username got censored] is not allowed to send email.
2024-08-13 10:50:47	info	plesk-sendmail [4189]	S4188: py-limit-out: stderr: ERROR:__main__:Rejecting message: system user uid='10005' is not allowed to send mail
2024-08-13 10:50:47	info	plesk-sendmail [4189]	S4188: add-from: stderr: PASS

I get the Error if I try to fill out a contact form on the website dasfitnesscoaching.de. The Site was build with Sitejetbuilder and the form in general works if I run it in the preview mode from the Sitejetbuilder.

The port 25 is already open, and I also had a call with the IONOS Support (where I host the server and Plesk) for several hours and the support couldn't figure the issue out and said that the Plesk forum would be my last option to solve the problem.

I am happy for any tips and any help.
With kind regards,
Stephan Dieterle

 

[Kaspar@Plesk]

Hi there, these error indicate that mail service isn't enabled for the domain. We have a support article explaining how to solve the issue here:

https://support.plesk.com/hc/en-us/articles/12377240396951-Unable-to-send-an-email-via-WordPress-contact-form-Rejecting-message-system-user-uid-xx-is-not-allowed-to-send-mail

 

[Stephan.FediCom]

Hi there, these error indicate that mail service isn't enabled for the domain. We have a support article explaining how to solve the issue here:

https://support.plesk.com/hc/en-us/articles/12377240396951-Unable-to-send-an-email-via-WordPress-contact-form-Rejecting-message-system-user-uid-xx-is-not-allowed-to-send-mail

Hey, thanks for the fast answer, but I already tried that and it doesn't work

 

[Bitpalast]

... said that the Plesk forum would be my last option to solve the problem.

Your last option will be official Plesk support. They will for sure be able to solve this issue for you.
To sign-in to support please go to https://support.plesk.com

If you bought your license from a reseller, your reseller should provide support for you. If the reseller does not provide support, here is an alternative:
https://support.plesk.com/hc/en-us/articles/12388090147095-How-to-get-support-directly-from-Plesk-

 

[danami]

@Stephan.FediCom You could try to whtielist the sysuser from the outgoing mail limits using the command below (replacing username with the real sysuser username):

/usr/local/psa/admin/sbin/mailmng-outgoing --add-to-whitelist --sysuser=username

 

[Stephan.FediCom]

Your last option will be official Plesk support. They will for sure be able to solve this issue for you.
To sign-in to support please go to https://support.plesk.com

If you bought your license from a reseller, your reseller should provide support for you. If the reseller does not provide support, here is an alternative:
https://support.plesk.com/hc/en-us/articles/12388090147095-How-to-get-support-directly-from-Plesk-

Yeah, I got the license from IONOS, and I already had a 3-hour call or so with the IONOS Support, but they were not able to help me out. So I guess I have to go with the Plesk Support subscription. But thanks for the link

 

[Stephan.FediCom]

@Stephan.FediCom You could try to whtielist the sysuser from the outgoing mail limits using the command below (replacing username with the real sysuser username):

/usr/local/psa/admin/sbin/mailmng-outgoing --add-to-whitelist --sysuser=username

I already tried that, because I already read that in some other threat, but sadly it didn't help :/ . But thanks for the effort